Upgrade your PHP to intermediate at http://x10hosting.com/account and wait 6-12 hours.
It may be that the old php versions were not configured correctly.
You have ariainvictus.com set as your domain. We do not provide free top level domains. They need to be purchased from domain registers. We only provide free subdomains.
I suggest setting the nameservers on the domain to ns1.x10hosting.com and ns2.x10hosting.com
Then you wont need to worry about all the other stuff and you'll be able to make the subdomains through cPanel.
Re: Your PHP installation appears to be missing the MySQL extension which is required
PHP is currently being upgraded.
http://forums.x10hosting.com/news-announcements/75722-updates-13.html#post428577